Daily Sunspot Evaluation
Observation Sheet Monday, 28 December 1998
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 5
- Number of spots (f)
- 56
- Relative number (R)
- 106
- Observer
- ıH
- Reading
- all checks consistent
- File
- 19981228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 22 | 35W | 229 | 38W | 1 | 309 |
| 2 | EHC – 15 | 26 | 31W | 225 | 34W | 11 | 309 |
| 3 | HA – 2 | 19 | 26W | 220 | 29W | 2 | 258 |
| 4 | EKC – 26 | 27 | 24E | 170 | 21E | 13 | 302 |
| 5 | DSC – 12 | -23 | 36E | 158 | 33E | 9 | 303 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.